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  <a name="EN-US_TOPIC_0000002200097873"></a><a name="EN-US_TOPIC_0000002200097873"></a>
  <h1 class="topictitle1">Restoring an EVS Disk</h1>
  <div>
   <p>This section describes how to restore an EVS disk that has been backed up to the original or a new location.</p>
   <div class="section">
    <h4 class="sectiontitle">Context</h4>
    <p>The <span>product</span> allows you to restore EVS disks to the original or a new location using backup copies or replication copies (data cannot be restored to the original cloud server).</p>
    <ul>
     <li>Restoration to the original location<p>Restoration to cloud servers in the current resource set is supported.</p></li>
     <li>Restoration to a new location<p>Restoration to the following new locations is supported:</p>
      <ul>
       <li>Another resource set of the Huawei Cloud Stack tenant to which the copy belongs</li>
       <li>Resource set of another Huawei Cloud Stack tenant to which the copy belongs</li>
       <li>Another Huawei Cloud Stack platform</li>
      </ul></li>
    </ul>
   </div>
   <div class="section">
    <h4 class="sectiontitle">Precautions</h4>
    <ul>
     <li>An ECS can be restored only when it is in any of the following states: <strong>Running</strong>, <strong>Starting</strong>, <strong>Stopping</strong>, <strong>Stopped</strong>, <strong>Reinstalling OS</strong>, <strong>Reinstalling OS failed</strong>, <strong>Changing OS</strong>, and <strong>OS Change failed</strong>.</li>
     <li id="EN-US_TOPIC_0000002200097873__li29291747171614">If only some EVS disks that have undergone volume management (such as logical volume management on Linux or dynamic volume management on Windows) on ECSs are restored, data on these EVS disks may not be properly accessed.</li>
     <li>During the restoration, the system will lock the cloud server and you are not allowed to perform any configuration operations on the cloud server.</li>
     <li>Copies of Huawei Cloud Stack 6.5.1 cannot be used for restoration to Huawei Cloud Stack 8.<em id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002164611566_i185510143316">X</em>.</li>
    </ul>
   </div>
   <div class="section">
    <h4 class="sectiontitle">Procedure</h4>
    <ol>
     <li id="EN-US_TOPIC_0000002200097873__li0198134611381"><span>Choose <span class="uicontrol" id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002199964685_uicontrol2088361125016"><b><span id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002199964685_text38837195013"><strong>Explore</strong></span> &gt; <span id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002199964685_text888319135019"><strong>Copy Data</strong></span> &gt; <span id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002199964685_text01201142214"><strong>Cloud Platforms</strong></span> &gt; <span id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002199964685_text2995643181015"><strong>Huawei Cloud Stack</strong></span></b></span>.</span></li>
     <li><span>Search for copies by resource or copy. This section describes how to search for copies by resource.</span><p></p><p>On the <strong><span><strong>Resources</strong></span></strong> tab page, locate the cloud server where an EVS disk is to be restored by cloud server name and click the name.</p> <p></p></li>
     <li><span>O the <span class="uicontrol"><b><span><strong>Copy Data</strong></span></b></span> page, select the year, month, and day in sequence to locate the copy.</span><p></p><p>If <span><img src="en-us_image_0000002200012345.png"></span> is displayed under a month or date, copies exist in the month or on the date.</p> <p></p></li>
     <li><span>Locate the copy to be restored and choose <span><strong>More</strong></span> &gt; <span><strong>Restoring EVS Disks</strong></span>.</span></li>
     <li><span>Select the EVS disk to be restored and click <span><strong>Select</strong></span> on the right of <strong>Restoration Target Location</strong>.</span></li>
     <li><span>Restore data to the original location or a new location.</span><p></p>
      <ul>
       <li>Restoration to the original location
        <div class="p">
         <a href="#EN-US_TOPIC_0000002200097873__table52750616234">Table 1</a> describes the related parameters. 
         <div class="tablenoborder">
          <a name="EN-US_TOPIC_0000002200097873__table52750616234"></a><a name="table52750616234"></a>
          <table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000002200097873__table52750616234" frame="border" border="1" rules="all">
           <caption>
            <b>Table 1 </b>Parameters for restoring data to the original location
           </caption>
           <colgroup>
            <col style="width:29.87%">
            <col style="width:70.13000000000001%">
           </colgroup>
           <thead align="left">
            <tr>
             <th align="left" class="cellrowborder" valign="top" width="29.87%" id="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.1"><p>Parameter</p></th>
             <th align="left" class="cellrowborder" valign="top" width="70.13000000000001%" id="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.2"><p>Description</p></th>
            </tr>
           </thead>
           <tbody>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.1 "><p>Clients</p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.2 ">
              <div class="p" id="EN-US_TOPIC_0000002200097873__p209666318304">
               Select a client for performing restoration jobs.
               <ul id="EN-US_TOPIC_0000002200097873__ul7928124643312">
                <li id="EN-US_TOPIC_0000002200097873__li13928204613314">For some models of this product, select the built-in or an external client for performing restoration jobs.</li>
                <li id="EN-US_TOPIC_0000002200097873__li3811164813311">For some models of this product, select an external client for performing restoration jobs.</li>
               </ul>
              </div></td>
            </tr>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.1 "><p><span><strong>Power on Automatically After Restoration</strong></span></p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.2 "><p id="EN-US_TOPIC_0000002200097873__p1362019387266">If this option is enabled, the cloud server automatically starts after the restoration is successful. This option is disabled by default.</p></td>
            </tr>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.1 "><p><span><strong>Copy Verification Before Restoration</strong></span></p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.1.1.2.2.3.1.2 "><p id="EN-US_TOPIC_0000002200097873__p166872430260">If this option is enabled, the integrity of a copy is verified before the copy is restored. This operation affects the restoration performance. This option is disabled by default. If no copy verification file is generated, this option cannot be enabled.</p></td>
            </tr>
           </tbody>
          </table>
         </div>
        </div></li>
       <li>Restoration to a new location
        <div class="p">
         <a href="#EN-US_TOPIC_0000002200097873__table15668141795417">Table 2</a> describes the related parameters. 
         <div class="tablenoborder">
          <a name="EN-US_TOPIC_0000002200097873__table15668141795417"></a><a name="table15668141795417"></a>
          <table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000002200097873__table15668141795417" frame="border" border="1" rules="all">
           <caption>
            <b>Table 2 </b>Parameters for restoring data to a new location
           </caption>
           <colgroup>
            <col style="width:29.87%">
            <col style="width:70.13000000000001%">
           </colgroup>
           <thead align="left">
            <tr>
             <th align="left" class="cellrowborder" valign="top" width="29.87%" id="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.1"><p>Parameter</p></th>
             <th align="left" class="cellrowborder" valign="top" width="70.13000000000001%" id="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.2"><p>Description</p></th>
            </tr>
           </thead>
           <tbody>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.1 "><p><span><strong>Cloud Server</strong></span></p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.2 "><p>Select the ECS to which the backup copy is restored.</p>
              <div class="note">
               <span class="notetitle"> NOTE: </span>
               <div class="notebody">
                <p>The OS type of the target ECS must be the same as that of the original ECS. For example, both of them use the Windows or Linux OS.</p>
               </div>
              </div></td>
            </tr>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.1 "><p>Clients</p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.2 ">
              <div class="p">
               Select a client for performing restoration jobs.
               <ul id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002200097873_ul7928124643312">
                <li id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002200097873_li13928204613314">For some models of this product, select the built-in or an external client for performing restoration jobs.</li>
                <li id="EN-US_TOPIC_0000002200097873__en-us_topic_0000002200097873_li3811164813311">For some models of this product, select an external client for performing restoration jobs.</li>
               </ul>
              </div></td>
            </tr>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.1 "><p><span><strong>Power on Automatically After Restoration</strong></span></p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.2 "><p>If this option is enabled, the cloud server automatically starts after the restoration is successful. This option is disabled by default.</p></td>
            </tr>
            <tr>
             <td class="cellrowborder" valign="top" width="29.87%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.1 "><p><span><strong>Copy Verification Before Restoration</strong></span></p></td>
             <td class="cellrowborder" valign="top" width="70.13000000000001%" headers="mcps1.3.4.2.6.2.1.2.1.2.2.3.1.2 "><p>If this option is enabled, the integrity of a copy is verified before the copy is restored. This operation affects the restoration performance. This option is disabled by default. If no copy verification file is generated, this option cannot be enabled.</p></td>
            </tr>
           </tbody>
          </table>
         </div>
        </div></li>
      </ul> <p></p></li>
     <li><span>Click <span class="uicontrol"><b>OK</b></span>.</span></li>
     <li><span>Select the target EVS disk for each EVS disk to be restored.</span><p></p>
      <div class="note">
       <img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span>
       <div class="notebody">
        <ul>
         <li>Data on data disks cannot be restored to system disks, but data on system disks can be restored to data disks.</li>
         <li>The restoration can be successful only when the target EVS disk is in the <strong>Running</strong> status and its capacity is greater than or equal to that of the EVS disk to be restored.</li>
        </ul>
       </div>
      </div> <p></p></li>
     <li><span>Click <span class="uicontrol"><b>OK</b></span>.</span></li>
    </ol>
   </div>
  </div>
  <div>
   <div class="familylinks">
    <div class="parentlink">
     <strong>Parent topic:</strong> <a href="en-us_topic_0000002200012281.html">Restoration</a>
    </div>
   </div>
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